{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX9FF550","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX9FF550","canonicalUrl":"https://aoctrl.com/schneider/LX9FF550","factsUrl":"https://aoctrl.com/api/mcp/products/LX9FF550","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys F, LX9FF550, specific contactor coil, 550 V AC 40-400 Hz low consumption, 130 ms opening / 35 ms closing, 10 Mcycles mechanical durability.","salesMarkdown":"The LX9FF550 is a specific replacement coil for TeSys F contactors, rated for 550 V AC control circuits at 40-400 Hz. It's a low-consumption design — inrush power sits at 690-855 VA, dropping to 6.6-8.1 VA holding — which means the control transformer and wiring only need to handle the brief surge, not a continuous high draw. The coil draws 331.4 Ω inrush and 12447 Ω holding at 68 °F (20 °C). Opening time is 130 ms and closing time is 35 ms — the asymmetry matters in sequencing: the contactor opens slower than it closes, so if you're interlocking with another device, the break-before-make window is driven by the opening delay. The coil has no built-in suppressor module, so you'll need to add an external RC snubber or varistor across the coil terminals to protect the control circuit from the inductive kick during dropout. Control voltage limits are 0.85-1.1 Uc for operation and 0.35-0.55 Uc for dropout at 131 °F (55 °C). That dropout range is wide — the coil releases at roughly 193-303 V on a 550 V nominal supply — so it won't drop out on a moderate sag, but a hard brownout below 193 V will release the contactor. Heat dissipation is 5.9-7.2 W, which adds to the panel thermal load; in a sealed enclosure, factor that into the cooling budget. That's about 40 cycles per minute continuous — fine for most motor starting and switching duty, but if you're cycling faster than that (e.g., in a rapid-indexing application), you'll exceed the mechanical rating. ## Deployment Context This coil mounts directly onto the TeSys F contactor frame — it's a specific replacement, not a universal fit. Because it's a low-consumption coil, it pairs well with PLC-sourced control signals through an interposing relay, keeping the PLC output contact loading low.","metaTitle":"TeSys LX9FF550 Specific Contactor Coil, 550 V AC, Obsolete","metaDescription":"TeSys F specific contactor coil, 550 V AC 40-400 Hz low consumption. Obsolete — sourced to order against RFQ. 130 ms opening, 35 ms closing. 10 Mcycles mechanical durability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Contactor & Starter Coils"],"specifications":{"Range":"TeSys","Category":"22341-CONTACTOR,D,K,&F ACCESS","Operating time":"130 ms opening 35 ms closing","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Heat dissipation":"5.9...7.2 W","Device short name":"LX9FF","Average resistance":"331.4 Ohm inrush 68 °F (20 °C) 12447 Ohm holding 68 °F (20 °C)","Inrush power in VA":"690...855 VA 40...400 Hz (at 68 °F (20 °C))","Control circuit type":"AC 40...400 Hz low consumption","Mechanical durability":"10 Mcycles","Nbr. of units in pkg.":"1","Maximum operating rate":"2400 cyc/h 131 °F (55 °C)","Product or Component Type":"Specific contactor coil","[Uc] control circuit voltage":"550 V AC 40...400 Hz","Control circuit voltage limits":"Operational 0.85...1.1 Uc 131 °F (55 °C)) Drop-out 0.35...0.55 Uc 131 °F (55 °C))","Hold-in power consumption in VA":"6.6...8.1 VA 40...400 Hz (at 68 °F (20 °C))","Ambient Air Temperature for Operation":"23...131 °F (-5...55 °C)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f22a642f545256b59c50d7de047f735e.pdf","sourceUrl":"https://www.se.com/us/en/product/LX9FF550/tesys-f-specific-contactor-coil-550-v-ac-40-400-hz-low-consumption/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LX9FF550/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to LX9FF550 in the TeSys F family?","answer":"The TeSys F family includes active coil variants at other control voltages. For a 550 V AC replacement, you would need to check the current TeSys F coil catalog for a part with the same mounting pattern and coil voltage. No direct pin-compatible successor is listed in the lifecycle record for this specific order code."},{"question":"What is the operating time of this coil?","answer":"Opening time is 130 ms and closing time is 35 ms. The slower opening time is the governing factor for interlock timing in safety or sequencing circuits."},{"question":"Does this coil include a built-in suppressor module?","answer":"No, the coil technology is listed as 'without built-in suppressor module'. An external RC snubber or varistor must be added across the coil terminals to suppress inductive voltage spikes during dropout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX9FF550","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/LX9FF550 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}